an ulcer is a break in the continuity of the covering epithelium-skin or mucous membrene
it may either follow molecular death of the surface epithelium or its traumatic removal
history:mode of set:traumatic ulcers heal by themslves if the traumatic agent is removed
but the ulcer may take turn towards chronicity
if the trauma continuos that means traumatic agent persists
eg:dental ulcer of the TONGUE diabetes may lead to ulcer formation
DURATION:syphilis INCUBATION PERIOD IS 3 TO 4 weeks
pain:ulcer associated with inflammation only be painful
syphilitic ulcers and trophic ulcers associated with nerve diseases such as tabes dorsalis,peripheral neuritis
tuberculous ulcers are slightly painful
ulcers from malignant diseases are not at all painful
tabes dorsalis syringomyelia may result an ulcer